Polyolefin blends used for non-woven applications
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United States of America Patent
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Jun 27, 2000
Issued Date -
N/A
app pub date -
Mar 2, 1998
filing date -
Mar 24, 1997
priority date (Note) -
Expired
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Abstract
The invention relates to methods for preparing a fiber, thread or yarn including a polymer blend of a predominantly atactic flexible polyolefin polymer having a high weight average molecular weight of at least about 100,000 and a heat of fusion of about 15 to 60 J/g with an isotactic polypropylene polymer, and forming the polymer blend into a fiber, thread or yarn, wherein the flexible polymer is present in an amount sufficient to increase the elasticity of the fiber, thread or yarn to inhibit substantial breakage thereof, for use in non-woven products. The invention also relates to the fiber, thread or yarn including the polymers, as well as non-woven products prepared therefrom. Moreover, the invention relates to composite articles including the fiber, thread or yarn in combination with adhesive compositions, and polymer blends used for such adhesive compositions.
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